Confidence interval for mean calculator

    • [DOC File]Confidence Interval Worksheet (6

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      99% versus 95% confidence interval. Find a 99% confidence interval for the mean weight µ of the population of male runners in #2 (with n=24). Is the 99% confidence interval wider or narrower than the 95% interval found in Exercise 6.12? Explain in plain language why this is true. Suppose you want the 99% interval to be the same width as the 95 ...

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    • [DOC File]STAT101 Worksheet: Confidence Intervals

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      Find a 95% confidence interval for the population mean . A random sample of 20 married women showed that the mean time spent on housework by them was 29.8 hours a week with a standard deviation of 6.7 hours. Find a 95% confidence interval for the mean time …

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    • [DOC File]Sampling and Sample Size - Columbia

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      A confidence interval for the mean should be based on at least twelve observations. The width of a confidence interval, involving estimate of variability and sample size decreases rapidly until 12 observations are reached and then decreases less rapidly.

      confidence interval calculator for population mean

    • [DOC File]Calculator Tip Sheet - Weebly

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      Enter population standard deviation, mean, sample size, confidence level. Calculate. To determine a confidence interval for the population proportion: STAT. TESTS. A: 1 PropZInt. Enter x, n, and confidence level x = yes’s n = everyone. Calculate Calculator Tip Sheet. Chapter 9. To conduct a hypothesis test for the population mean, with n < 30 ...

      confidence interval calculator difference between two means

    • [DOC File]Stats 156 – Calculator Stuff

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      is the mean. Sx is the standard deviation assuming the data was a sample ... Confidence Interval for (In STAT – inside TESTS. 1. 1-PropZInt. x = # successes, n = sample size, C – Level = desired confidence level. Confidence Interval for ... • Go to MATRIX in the calculator • Choose “EDIT” and 1:[A] • Enter the size of the matrix ...

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    • [DOC File]Confidence Interval for a Mean

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      (8.3) Confidence Interval for a Mean Practice. The purpose of a confidence interval is to estimate an unknown population parameter using a sample statistic, with an indication of how accurate the estimate is (+/–) and of how confident we are that the result is correct (95%).

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    • [DOC File]Thursday, January 13: Chapter 7 Review

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      Jan 09, 2013 · Check the conditions for calculating a confidence interval for the parameter. Construct a 99% confidence interval for the parameter. Interpret the interval in context. Is it plausible that more than 60% of all pennies in circulation are more than 10 years old? HW #7: page 490 (10, 20, 21–24), page 504 (27, 29, 31, 33, 34)

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    • [DOCX File]JustAnswer

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      Apr 29, 2013 · Determine and interpret a 90% confidence interval for the mean BAC in fatal crashes in which the driver had a positive BAC. The 90% confidence interval for the mean BAC is (0.147, 0.153). Round to the nearest thousandth. We are 90% confident that the mean BAC in fatal crashes in which the driver had a positive BAC is in the interval (0.147, 0.153).

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    • [DOC File]Statistics Calculator - My Math Genius

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      Compute a 95% confidence interval for a sample of 50 items, where the mean was computed to be 20, and the population standard deviation is known to by 10. Solution: Note that since the population standard deviation is known we can use the “z” interval. Step1: make sure you are on the “confidence interval” worksheet (there are 3 worksheets)

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    • [DOC File]Interval Estimator - (or confidence interval)

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      One-Sample Test Test Value = 0 t df Sig. (2-tailed) Mean Difference 99% Confidence Interval of the Difference Lower Upper Siblings 19.498 168 .000 1.781 1.54 2.02 Large sample CIs about a …

      z confidence interval calculator

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